Solve linear tensor equation
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I am building a fem code and want to solve an equation of the form
f= tensorprod(A,u,[2,4],[1,2])
where:
size(A)= n by n by 2 by 2
Size(u) = n by 2
Size(F) = n by 2.
A and f are known, u is to be solved
please note that n is a large number e.g order of 1e4 and this equation has to be solved often
n=5;
A=rand(n,n,2,2);
u=rand(n,2); %u is actually the variable that is to be solved while f is known
f=tensorprod(A,u,[2 4],[1 2])
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